How tennis players can maintain their strokes by staying injury-free From Grand Slam tournaments to recreational leagues, tennis players are feeling the strain after their matches. You might think that tennis elbow is the most likely injury for the serve-and-volley set — but it’s no match for more common afflictions. Sixty-seven percent of tennis-related injuries involve the lower extremities, according to the American Academy of Orthopedic Surgeons (AAOS). The jarring nature of tennis, with its intermittent stops and starts, can be devastating on the hips, knees, feet and ankles. To keep tennis players on the court, the AAOS tosses up these…